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DM74S257N Scheda tecnica(PDF) 4 Page - National Semiconductor (TI) |
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DM74S257N Scheda tecnica(HTML) 4 Page - National Semiconductor (TI) |
4 / 8 page ’S258 Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) (Continued) Symbol Parameter Conditions Min Typ Max Units (Note 1) IOZH Off-State Output Current VCC e Max VO e 24V with High Level Output VIH e Min VIL e Max 50 m A Voltage Applied IOZL Off-State Output Current with VCC e Max VO e 05V Low Level Output VIH e Min VIL e Max b 50 m A Voltage Applied IOS Short Circuit VCC e Max DM54 b 40 b 100 mA Output Current (Note 2) DM74 b 40 b 100 ICCH Supply Current with VCC e Max 36 56 mA Outputs High (Note 3) ICCL Supply Current with VCC e Max 52 81 mA Outputs Low (Note 3) ICCZ Supply Current with VCC e Max 56 87 mA Outputs Disabled (Note 3) Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second Note 3 ICC is measured with all outputs open and all possible inputs grounded while achieving the stated output conditions ’S258 Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) RL e 280X Symbol Parameter To (Output) CL e 15 pF CL e 50 pF Units Min Max Min Max tPLH Propagation Delay Time Data to 69 ns Low to High Level Output Output tPHL Propagation Delay Time Data to 69 ns High to Low Level Output Output tPLH Propagation Delay Time Select to 12 15 ns Low to High Level Output Output tPHL Propagation Delay Time Select to 12 15 ns High to Low Level Output Output tPZH Output Enable Time Output 195 23 ns to High Level Output Control to Y tPZL Output Enable Time Output 21 24 ns to Low Level Output Control to Y tPHZ Output Disable Time Output 85 ns to High Level Output (Note 1) Control to Y tPLZ Output Disable Time Output 14 ns to Low Level Output (Note 1) Control to Y Note 1 CL e 5 pF 4 |
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